EP0914557A1 - Electrovanne par exemple d'impact pour un systeme d'injection de carburant par effet de coup de belier dans un moteur de vehicule - Google Patents
Electrovanne par exemple d'impact pour un systeme d'injection de carburant par effet de coup de belier dans un moteur de vehiculeInfo
- Publication number
- EP0914557A1 EP0914557A1 EP97931890A EP97931890A EP0914557A1 EP 0914557 A1 EP0914557 A1 EP 0914557A1 EP 97931890 A EP97931890 A EP 97931890A EP 97931890 A EP97931890 A EP 97931890A EP 0914557 A1 EP0914557 A1 EP 0914557A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve body
- outlet
- plunger core
- solenoid valve
- plunger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 34
- 238000002347 injection Methods 0.000 title claims description 15
- 239000007924 injection Substances 0.000 title claims description 15
- 238000007789 sealing Methods 0.000 claims abstract description 3
- 238000006073 displacement reaction Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/06—Use of pressure wave generated by fuel inertia to open injection valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2037—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit for preventing bouncing of the valve needle
Definitions
- the present invention relates to a solenoid valve for example impact for a fuel injection system by water hammer effect in a vehicle engine. 5 Pollution control standards and the energy savings imposed on vehicle manufacturers have led them to develop different systems for injecting fuel into engines.
- the energy necessary for such an increase in pressure must be supplied by the engine itself or by an auxiliary energy source and on board the vehicle if the application relates to a vehicle.
- a so-called impact electrovalve is connected to the fuel injector in the engine, in order to create, by successive opening and closing of the latter, fuel pressure waves at the level of the injector.
- valves and solenoid valves including impact for such systems.
- This magnetic piece and this plunger core are arranged one in the extension of the other, in the recess of the electromagnet coil and the plunger core is connected to means for closing the outlet.
- valve body to control the opening and closing of the latter in response to a command to supply the electromagnet coil, by axial displacement of the plunger core with respect to the magnetic part, and coming into contact with contact surfaces facing this magnetic part and this plunger core.
- the object of the invention is therefore to solve these problems.
- the subject of the invention is a solenoid valve, for example an impact valve for a fuel injection system by the effect of water hammer in a vehicle engine, of the type comprising a tubular valve body having at its ends, a fuel inlet and outlet, and in which is disposed an electromagnet coil connected to means for feeding the latter and associated with a magnetic part tubular and a tubular plunger, arranged in the extension of one another in the recess of the electromagnet coil, and having facing contact surfaces, the plunger being connected to means closing the outlet of the valve body so that, in response to the excitation or not of the electromagnet coil under the control of the supply means thereof, open or close the outlet of the valve body, by axial displacement of the plunger core with respect to the magnetic part and bearing against the contact surfaces thereof in the open position of the outlet of the valve body, and means for elastic biasing of the plunger core in the closed position from the valve body outlet, characterized in that the means for controlling the supply of the electromagnet coil are adapted to apply to it
- - Fig.l shows a sectional view illustrating the general structure of an exemplary embodiment of an impact solenoid valve according to the invention
- - Fig.2 illustrates the form of a supply current delivered by control means to a coil of electromagnet used in the constitution of this solenoid valve.
- a solenoid valve designated by the general reference 1 which can be used as an impact solenoid valve for a water hammer injection system in a vehicle engine.
- the solenoid valve according to the invention conventionally comprises a tubular valve body designated by the general reference 2 having at its ends, a fuel inlet and outlet, respectively 3 and 4.
- valve body In this valve body is arranged an electromagnet coil designated by the general reference 5, this electromagnet coil being associated with a tubular magnetic part designated by the general reference 6 and with a tubular plunger core designated by the general reference 7.
- this electromagnet coil is connected to means for controlling its power supply designated by the reference 5a in this figure 1.
- the magnetic part 6 and the plunger core 7 are arranged 1 'in the extension of 1' other, in the recess of the electromagnet coil between the fuel inlet and outlet and the plunger core 7 is connected to means 8 for closing the outlet 4 of the valve body 2, to control the opening and closing of the latter in response to a command to supply the electromagnet coil 5, by axial displacement of the plunger core 7 relative to the magnetic part.
- the sealing means can have different suitable forms known in the state of the art.
- outlet 4 of this valve body can be associated with a nozzle 9 having for example a hollow flared ent, either in stages as shown, or continuously.
- the means 10 for guiding the displacements of the plunger core comprise, for example, a tubular guide sleeve, a first end of which, for example 10a, extends into the magnetic part 6 and a second end of which, for example 10b, projects beyond this magnetic part .
- the plunger core 7 is then placed on this second end 10b of the guide sleeve 10 and is therefore mounted to be displaceable by sliding around this end of the guide sleeve.
- the elastic means 11 for biasing this plunger core in the closed position of the outlet of the valve body are also disposed in the recess thereof, in the extension of the guide sleeve between the second end of that -ci and a corresponding abutment surface, for example 7a, of the plunger core.
- these elastic means may comprise a spring, for example a helical spring disposed in the plunger core, in the extension of the guide sleeve, one of the ends of this helical spring 11 being in abutment on the end corresponding to the guide sleeve, while the other end of the latter is in abutment on the abutment surface 7a of the plunger core.
- a spring for example a helical spring disposed in the plunger core, in the extension of the guide sleeve, one of the ends of this helical spring 11 being in abutment on the end corresponding to the guide sleeve, while the other end of the latter is in abutment on the abutment surface 7a of the plunger core.
- the plunger core 7 is caused to move from the closed position of the means for closing the outlet of this valve body, such as as illustrated in this figure, towards its open position by axial displacement of this core plunger on the corresponding end of the guide means and more particularly of the guide sleeve.
- This structure has a number of advantages, particularly in terms of its simplicity of construction and operation.
- the guide means no longer form an obstacle to the magnetic flux lines of the electromagnet coil, as was the case in the prior art, which makes it possible to improve the magnetic efficiency. that of the whole.
- a fuel injector (not shown) can be connected by means of, for example, a line 12 to the solenoid valve, upstream of the shut-off means, by means of any connection means generally designated. by reference 13 in the figure.
- the magnetic part 6 and the plunger core 7 have contact surfaces respectively 6a, 7b facing each other, adapted to come into abutment against one another, when the opening of the outlet of the valve body following the excitation of the electromagnet coil 5 by the control means 5a.
- One or both of these contact surfaces advantageously have protruding and recessed portions which make it possible to reduce the area of these bearing surfaces. one against the other, when the plunger core is in the open position of the outlet of the valve body.
- the corresponding surface 6a of the magnetic part 6 in fact comprises a continuous annular shoulder 6b.
- This configuration makes it possible to reduce the residual forces between the magnetic part 6 and the plunger core 7, which are relatively large, and this in particular when the valve body is closed, these residual forces limiting the generation of the pressure wave of fuel and the operating frequencies of this valve, by increasing the closing time of the solenoid valve. It can therefore be seen that the configuration described makes it possible to reduce these forces while optimizing the air gap and therefore the energy consumption of this solenoid valve.
- such a current comprises two phases, one called the call designated by the reference A in this figure, and the other called holding designated by the reference M in this figure.
- Such a current form makes it possible to create relatively large magnetic forces of attraction of the plunger core 7 during the detachment phase thereof, then to limit these forces to a level sufficient to keep the plunger core 7 against the magnetic part 6 in particular to achieve energy savings.
- the current I, at the end of the call phase A has a reduced slope compared to that of the start of the latter, which makes it possible to reduce the impact of the plunger core 7 on the magnetic part 6 during the opening of the outlet of the valve body and therefore the risks of degradation of these parts.
- this current I indeed has two slopes designated by Al and A2 respectively in this figure, for the start and the end of the call phase A thereof. It can be seen that during phase A1, the current has a relatively large slope, while during phase A2, the current has a reduced slope compared to that of the first part of this phase.
- the current I has a positive slope and increases slightly to compensate for the increase in the hydrodynamic force exerted by the fuel on the plunger, as the speed of the fuel in the valve body increases.
- the holding current does not remain constant at the necessary value corresponding to the maximum speed of the fuel for a period of opening of the valve, which makes it possible to achieve energy savings.
- control means having any structure, for example conventional programmable. It is therefore understandable that in the solenoid valve according to the invention, the characteristics which have just been described with regard to the contact surfaces of the magnetic part and of the plunger core and of the excitation current of the applied electromagnet coil to the latter by the control means thereof, make it possible to optimize the operation of this solenoid valve and in particular its response time to opening and closing, its operating frequency, its service life and its ⁇ energy consum tion.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetically Actuated Valves (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9609243 | 1996-07-23 | ||
FR9609243A FR2751700B1 (fr) | 1996-07-23 | 1996-07-23 | Electrovanne par exemple d'impact pour un systeme d'injection de carburant par effet de coup de belier dans un moteur de vehicule |
PCT/FR1997/001224 WO1998003789A1 (fr) | 1996-07-23 | 1997-07-07 | Electrovanne par exemple d'impact pour un systeme d'injection de carburant par effet de coup de belier dans un moteur de vehicule |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0914557A1 true EP0914557A1 (fr) | 1999-05-12 |
EP0914557B1 EP0914557B1 (fr) | 2002-03-20 |
Family
ID=9494369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97931890A Expired - Lifetime EP0914557B1 (fr) | 1996-07-23 | 1997-07-07 | Electrovanne par exemple d'impact pour un systeme d'injection de carburant par effet de coup de belier dans un moteur de vehicule |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0914557B1 (fr) |
AT (1) | ATE214788T1 (fr) |
AU (1) | AU3548297A (fr) |
DE (1) | DE69711186T2 (fr) |
ES (1) | ES2172802T3 (fr) |
FR (1) | FR2751700B1 (fr) |
WO (1) | WO1998003789A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2333132A (en) * | 1997-08-02 | 1999-07-14 | Lucas Ind Plc | Spill valve control method. |
DE102004019152B4 (de) * | 2004-04-21 | 2007-05-31 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Magnetventils zur Mengensteuerung |
FR2941781B1 (fr) * | 2009-02-05 | 2011-03-04 | Peugeot Citroen Automobiles Sa | Procede de diagnostic de l'etat d'une electrovanne |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD105653A1 (fr) * | 1973-07-13 | 1974-05-05 | ||
JPS57163784A (en) * | 1981-04-01 | 1982-10-08 | Komatsu Ltd | Solenoid valve driving circuit |
IT1175561B (it) * | 1984-07-12 | 1987-07-01 | Spica Spa | Elettroiniettore perfezionato per alimentare combustibile a un motore a c.i. |
DE3616356A1 (de) * | 1986-05-15 | 1987-11-19 | Vdo Schindling | Verfahren und schaltungsanordnung zur ansteuerung eines einspritzventils |
DE4106015A1 (de) * | 1991-02-26 | 1992-08-27 | Ficht Gmbh | Druckstoss-kraftstoffeinspritzung fuer verbrennungsmotoren |
IT1251259B (it) * | 1991-12-23 | 1995-05-05 | Elasis Sistema Ricerca Fiat | Circuito di comando di carichi prevalentemente induttivi, in particolare elettroiniettori. |
-
1996
- 1996-07-23 FR FR9609243A patent/FR2751700B1/fr not_active Expired - Fee Related
-
1997
- 1997-07-07 ES ES97931890T patent/ES2172802T3/es not_active Expired - Lifetime
- 1997-07-07 EP EP97931890A patent/EP0914557B1/fr not_active Expired - Lifetime
- 1997-07-07 WO PCT/FR1997/001224 patent/WO1998003789A1/fr active IP Right Grant
- 1997-07-07 DE DE69711186T patent/DE69711186T2/de not_active Expired - Fee Related
- 1997-07-07 AT AT97931890T patent/ATE214788T1/de active
- 1997-07-07 AU AU35482/97A patent/AU3548297A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9803789A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1998003789A1 (fr) | 1998-01-29 |
DE69711186T2 (de) | 2002-08-14 |
EP0914557B1 (fr) | 2002-03-20 |
ATE214788T1 (de) | 2002-04-15 |
FR2751700B1 (fr) | 1998-10-30 |
FR2751700A1 (fr) | 1998-01-30 |
DE69711186D1 (de) | 2002-04-25 |
ES2172802T3 (es) | 2002-10-01 |
AU3548297A (en) | 1998-02-10 |
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